I’m having the exact same issue. I need the functionality of breaking down listings by type for the plugin to be of any use at all to the broker. I submitted a ticket on their site on the 4th but am yet to receive a reply.
I create the filters and paste them in a way that feels correct [fsrep-filter-X], but it acts as though there are no properties to match the sort.
Good luck, Matt and hopefully you hear something as well. Please share if you do.